11839681 has 8 divisors (see below), whose sum is σ = 13564800. Its totient is φ = 10123008.

The previous prime is 11839669. The next prime is 11839691. The reversal of 11839681 is 18693811.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11839681 - 2⁹ = 11839169 is a prime.

It is a super-2 number, since 2×11839681² = 280356092363522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11839681.

It is not an unprimeable number, because it can be changed into a prime (11839621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1260 + ... + 5026.

It is an arithmetic number, because the mean of its divisors is an integer number (1695600).

Almost surely, 2^11839681 is an apocalyptic number.

It is an amenable number.

11839681 is a deficient number, since it is larger than the sum of its proper divisors (1725119).

11839681 is an equidigital number, since it uses as much as digits as its factorization.

11839681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4223.

The product of its digits is 10368, while the sum is 37.

The square root of 11839681 is about 3440.8837527589. The cubic root of 11839681 is about 227.9187216702.

The spelling of 11839681 in words is "eleven million, eight hundred thirty-nine thousand, six hundred eighty-one".